Induced-Moment Weak Antiferromagnetism and Orbital Order on the Itinerant-Localized Duality Model with Nested Fermi Surface : A Possible Origin of Exotic Magnetism in URu_2Si_2
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概要
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The weak antiferromagnetistn of URu3Si,z is discussed on the basis of a dvnality naodel whichtakes into account salient feattrres of both itinerant fernuions and "localized" counponent of spindegrees of freedona. The probleraa is analyzed in the franaework of induced-naon'xent tnechanisnaby taking a singlet-singlet crystal field scheuuae together with the nesting property of partialFermi surface of itinerant fermions . It is shown that the extreraaely srtaall ordered rnornent m of0(10 'xpg) can be conapatible with the large specific-heat .jtrnup at the transition temperatureTy. Analysis perfornaed in the presence of external magnetic field shows that the field dependenceof m in the Iirtait T -+ O and V'N do not scale except very near the critical field Be xvhich isconsistent with a recent observation by Nlentink et at. It is also shown that the antiferromagneticmagnetic order gives rise to a tiny amotrnt of antiferroztaagnetic orbital order of fLeIectrons.
- 社団法人日本物理学会の論文
- 1998-07-15
著者
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Miyake Kazumasa
Department Of Internal Medicine Division Of Gastroenterology Nippon Medical School
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Okuno Yukihiro
Department Of Physics Faculy Of Science Kyoto University:department Of Physical Science Graduate Sch
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Okuno Yukihiro
Department Of Physics Kyoto University:department Of Physical Science Graduate School Of Engineering
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Miyake Kazumasa
Department Of Physical Science Graduate School Of Engineering Science Osaka University
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